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Accrued Expenses | 3 Months Ended
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Mar. 31, 2023
Accrued Expenses |
Accrued Expenses | 5.Accrued Expenses Accrued expenses consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Accrued contracted costs | ​ | $ | 2,818 | ​ | $ | 2,822
Accrued compensation | ​ | ​ | 974 | ​ | ​ | 3,373
Accrued professional fees | ​ | ​ | 955 | ​ | ​ | 588
Accrued other | ​ | ​ | 409 | ​ | ​ | 407
Accrued milestones | ​ | ​ | — | ​ | ​ | 500
Total | ​ | $ | 5,156 | ​ | $ | 7,690
​

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